Growth in stand up comedy does NOT just happen.
You won't become a better comic simply by getting stage time. You WILL get to be a better comic by SMART use of stage time.
What does that mean? Well keep in mind there are always things you should be working on rather than just taking the stage and strutting your stuff. In the moment on stage while working on future moments all at the same time is a good plan.
If you're serious about stand up comedy there are many things that this could be, jokes, wording of jokes, placing and pacing of jokes, character behind the jokes, potential call back opportunities, listening to the audience as to what jokes really hit, which ones tanked, etc are but a few things that should have your full undivided attention in order to improve, NOT just how long or how short time wise you were on stage.